APA (7th ed.) Citation

Wallace, J. G. (1972). Stages and transition in conceptual development.

Chicago Style (17th ed.) Citation

Wallace, John Gilbert. Stages and Transition in Conceptual Development. 1972.

MLA (9th ed.) Citation

Wallace, John Gilbert. Stages and Transition in Conceptual Development. 1972.

Warning: These citations may not always be 100% accurate.